Projector Reflector Tilt and Scanning Power Control
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Solution Overview
Problem
Current depth sensing methods, such as monocular structured light and Time of Flight, face challenges in efficiently and accurately projecting structured light patterns across varying environments, particularly in adjusting scanning power and reflector tilt angles to ensure effective scanning while ensuring safety and reducing power consumption.
Innovation Solution
A method and apparatus for controlling a projector that determines position information and scanning power using a pre-generated scanning power table, adjusts the reflector's tilt angle based on positional relationships, and controls a light source to emit a light beam at the determined scanning power, enabling adjustable scanning power projection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the light source emits light beam at high scanning power to ensure effective scanning in varying environments, then the scanning effectiveness and projection quality are improved, but the power consumption increases and safety concerns arise
Solution Approach 1:
The patent implements dynamic adjustment of scanning power based on real-time detection of ambient conditions and object types. The controller modifies the light beam parameters adaptively, transitioning from static high-power emission to dynamic power level adjustment, resolving the contradiction between maintaining scanning effectiveness and reducing power consumption
Solution Approach 2:
The system changes the parameters of the light beam (power level, intensity) based on detected environmental conditions and object characteristics. By modifying these parameters adaptively, the system achieves effective scanning only when necessary while reducing power consumption during normal operation, thus resolving the contradiction
2Measurement precision
If the reflector tilt angle is adjusted frequently to scan different positions in the to-be-projected area, then the scanning coverage and position accuracy are improved, but the system complexity and control difficulty increase
Solution Approach 1:
The system employs self-service mechanisms where the controller automatically determines position information and calculates required reflector tilt angles based on pre-stored spatial relationships. This automation reduces control difficulty and system complexity while maintaining high position accuracy, as the system serves itself without requiring complex external control mechanisms
Solution Approach 2:
The patent implements preliminary action by pre-storing the spatial relationships between reflector tilt angles and target positions in a power table. This pre-computed data allows the controller to quickly determine the required reflector adjustment for any given position without complex real-time calculations, thereby reducing control system complexity while maintaining position accuracy
3Object-affected harmful factors
If the scanning power is increased to ensure safety in environments with varying ambient conditions, then the safety and reliability are improved, but the power consumption and energy waste increase
Solution Approach 1:
The patent applies local quality by adjusting the scanning power specifically for detected objects or regions of interest rather than uniformly increasing power across the entire scanning area. This localized power adjustment ensures safety for critical targets while minimizing energy waste in areas where high power is not necessary, thus resolving the contradiction between safety and energy efficiency
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach allows for efficient and safe scanning of a to-be-projected area by optimizing scanning power and reflector adjustments, improving projection quality and reducing power consumption while ensuring safety, particularly in environments with varying ambient conditions and object types.
Implementation Method 1
adjusting a tilt angle of the reflector to change the tilt angle of the reflector, and to enable a light beam incident onto the reflector to be reflected to the target position
Data Source
AI summary
A method and apparatus for controlling a projector are provided. A specific embodiment of the method includes: determining position information of a target position in a to-be-projected area; determining a scanning power of scanning the target position based on a pre-generated scanning power table and the position information of the target position, the scanning power table used for characterizing a corresponding relationship between the scanning power and the position information; adjusting a tilt angle of a reflector to change the tilt angle of the reflector, and to enable a light beam incident onto the reflector to be reflected to the target position; and controlling a light source to emit the light beam to the reflector at the determined scanning power. The embodiment has achieved scanning a to-be-projected area at an adjustable scanning power.